crypto/perlasm/x86unix.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86unix;
   4
   5 $label="L000";
   6 $const="";
   7
   8 $align=($main'aout)?"4":"16";
   9 $under=($main'aout)?"_":"";
  10 $com_start=($main'sol)?"/":"#";
  11
  12 sub main'asm_init_output { @out=(); }
  13 sub main'asm_get_output { return(@out); }
  14 sub main'get_labels { return(@labels); }
  15 sub main'external_label { push(@labels,@_); }
  16
  17 if ($main'cpp)
  18         {
  19         $align="ALIGN";
  20         $under="";
  21         $com_start='/*';
  22         $com_end='*/';
  23         }
  24
  25 %lb=(   'eax',  '%al',
  26         'ebx',  '%bl',
  27         'ecx',  '%cl',
  28         'edx',  '%dl',
  29         'ax',   '%al',
  30         'bx',   '%bl',
  31         'cx',   '%cl',
  32         'dx',   '%dl',
  33         );
  34
  35 %hb=(   'eax',  '%ah',
  36         'ebx',  '%bh',
  37         'ecx',  '%ch',
  38         'edx',  '%dh',
  39         'ax',   '%ah',
  40         'bx',   '%bh',
  41         'cx',   '%ch',
  42         'dx',   '%dh',
  43         );
  44
  45 %regs=( 'eax',  '%eax',
  46         'ebx',  '%ebx',
  47         'ecx',  '%ecx',
  48         'edx',  '%edx',
  49         'esi',  '%esi',
  50         'edi',  '%edi',
  51         'ebp',  '%ebp',
  52         'esp',  '%esp',
  53         );
  54
  55 %reg_val=(
  56         'eax',  0x00,
  57         'ebx',  0x03,
  58         'ecx',  0x01,
  59         'edx',  0x02,
  60         'esi',  0x06,
  61         'edi',  0x07,
  62         'ebp',  0x05,
  63         'esp',  0x04,
  64         );
  65
  66 sub main'LB
  67         {
  68         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  69         return($lb{$_[0]});
  70         }
  71
  72 sub main'HB
  73         {
  74         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  75         return($hb{$_[0]});
  76         }
  77
  78 sub main'DWP
  79         {
  80         local($addr,$reg1,$reg2,$idx)=@_;
  81
  82         $ret="";
  83         $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
  84         $reg1="$regs{$reg1}" if defined($regs{$reg1});
  85         $reg2="$regs{$reg2}" if defined($regs{$reg2});
  86         $ret.=$addr if ($addr ne "") && ($addr ne 0);
  87         if ($reg2 ne "")
  88                 {
  89                 if($idx ne "")
  90                     { $ret.="($reg1,$reg2,$idx)"; }
  91                 else
  92                     { $ret.="($reg1,$reg2)"; }
  93                 }
  94         else
  95                 { $ret.="($reg1)" }
  96         return($ret);
  97         }
  98
  99 sub main'BP
 100         {
 101         return(&main'DWP(@_));
 102         }
 103
 104 sub main'BC
 105         {
 106         return @_;
 107         }
 108
 109 sub main'DWC
 110         {
 111         return @_;
 112         }
 113
 114 #sub main'BP
 115 #       {
 116 #       local($addr,$reg1,$reg2,$idx)=@_;
 117 #
 118 #       $ret="";
 119 #
 120 #       $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
 121 #       $reg1="$regs{$reg1}" if defined($regs{$reg1});
 122 #       $reg2="$regs{$reg2}" if defined($regs{$reg2});
 123 #       $ret.=$addr if ($addr ne "") && ($addr ne 0);
 124 #       if ($reg2 ne "")
 125 #               { $ret.="($reg1,$reg2,$idx)"; }
 126 #       else
 127 #               { $ret.="($reg1)" }
 128 #       return($ret);
 129 #       }
 130
 131 sub main'mov    { &out2("movl",@_); }
 132 sub main'movb   { &out2("movb",@_); }
 133 sub main'and    { &out2("andl",@_); }
 134 sub main'or     { &out2("orl",@_); }
 135 sub main'shl    { &out2("sall",@_); }
 136 sub main'shr    { &out2("shrl",@_); }
 137 sub main'xor    { &out2("xorl",@_); }
 138 sub main'xorb   { &out2("xorb",@_); }
 139 sub main'add    { &out2("addl",@_); }
 140 sub main'adc    { &out2("adcl",@_); }
 141 sub main'sub    { &out2("subl",@_); }
 142 sub main'rotl   { &out2("roll",@_); }
 143 sub main'rotr   { &out2("rorl",@_); }
 144 sub main'exch   { &out2("xchg",@_); }
 145 sub main'cmp    { &out2("cmpl",@_); }
 146 sub main'lea    { &out2("leal",@_); }
 147 sub main'mul    { &out1("mull",@_); }
 148 sub main'div    { &out1("divl",@_); }
 149 sub main'jmp    { &out1("jmp",@_); }
 150 sub main'jmp_ptr { &out1p("jmp",@_); }
 151 sub main'je     { &out1("je",@_); }
 152 sub main'jle    { &out1("jle",@_); }
 153 sub main'jne    { &out1("jne",@_); }
 154 sub main'jnz    { &out1("jnz",@_); }
 155 sub main'jz     { &out1("jz",@_); }
 156 sub main'jge    { &out1("jge",@_); }
 157 sub main'jl     { &out1("jl",@_); }
 158 sub main'jb     { &out1("jb",@_); }
 159 sub main'jc     { &out1("jc",@_); }
 160 sub main'jnc    { &out1("jnc",@_); }
 161 sub main'jno    { &out1("jno",@_); }
 162 sub main'dec    { &out1("decl",@_); }
 163 sub main'inc    { &out1("incl",@_); }
 164 sub main'push   { &out1("pushl",@_); $stack+=4; }
 165 sub main'pop    { &out1("popl",@_); $stack-=4; }
 166 sub main'not    { &out1("notl",@_); }
 167 sub main'call   { &out1("call",$under.$_[0]); }
 168 sub main'ret    { &out0("ret"); }
 169 sub main'nop    { &out0("nop"); }
 170
 171 # The bswapl instruction is new for the 486. Emulate if i386.
 172 sub main'bswap
 173         {
 174         if ($main'i386)
 175                 {
 176                 &main'comment("bswapl @_");
 177                 &main'exch(main'HB(@_),main'LB(@_));
 178                 &main'rotr(@_,16);
 179                 &main'exch(main'HB(@_),main'LB(@_));
 180                 }
 181         else
 182                 {
 183                 &out1("bswapl",@_);
 184                 }
 185         }
 186
 187 sub out2
 188         {
 189         local($name,$p1,$p2)=@_;
 190         local($l,$ll,$t);
 191         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 192                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 193                                 "shll",0xD1E0,"shrl",0xD1E8,
 194                                 "sarl",0xD1F8);
 195
 196         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 197                 {
 198                 $op=$special{$name}|$reg_val{$p1};
 199                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 200                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 201                 push(@out,$tmp1);
 202                 push(@out,$tmp2);
 203
 204                 $p2=&conv($p2);
 205                 $p1=&conv($p1);
 206                 &main'comment("$name $p2 $p1");
 207                 return;
 208                 }
 209
 210         push(@out,"\t$name\t");
 211         $t=&conv($p2).",";
 212         $l=length($t);
 213         push(@out,$t);
 214         $ll=4-($l+9)/8;
 215         $tmp1=sprintf("\t" x $ll);
 216         push(@out,$tmp1);
 217         push(@out,&conv($p1)."\n");
 218         }
 219
 220 sub out1
 221         {
 222         local($name,$p1)=@_;
 223         local($l,$t);
 224         local(%special)=("bswapl",0x0FC8);
 225
 226         if ((defined($special{$name})) && defined($regs{$p1}))
 227                 {
 228                 $op=$special{$name}|$reg_val{$p1};
 229                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 230                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 231                 push(@out,$tmp1);
 232                 push(@out,$tmp2);
 233
 234                 $p2=&conv($p2);
 235                 $p1=&conv($p1);
 236                 &main'comment("$name $p2 $p1");
 237                 return;
 238                 }
 239
 240         push(@out,"\t$name\t".&conv($p1)."\n");
 241         }
 242
 243 sub out1p
 244         {
 245         local($name,$p1)=@_;
 246         local($l,$t);
 247
 248         push(@out,"\t$name\t*".&conv($p1)."\n");
 249         }
 250
 251 sub out0
 252         {
 253         push(@out,"\t$_[0]\n");
 254         }
 255
 256 sub conv
 257         {
 258         local($p)=@_;
 259
 260 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 261
 262         $p=$regs{$p} if (defined($regs{$p}));
 263
 264         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 265         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 266         return $p;
 267         }
 268
 269 sub main'file
 270         {
 271         local($file)=@_;
 272
 273         local($tmp)=<<"EOF";
 274         .file   "$file.s"
 275         .version        "01.01"
 276 gcc2_compiled.:
 277 EOF
 278         push(@out,$tmp);
 279         }
 280
 281 sub main'function_begin
 282         {
 283         local($func)=@_;
 284
 285         &main'external_label($func);
 286         $func=$under.$func;
 287
 288         local($tmp)=<<"EOF";
 289 .text
 290         .align $align
 291 .globl $func
 292 EOF
 293         push(@out,$tmp);
 294         if ($main'cpp)
 295                 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
 296         elsif ($main'gaswin)
 297                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 298         else    { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
 299         push(@out,"$func:\n");
 300         $tmp=<<"EOF";
 301         pushl   %ebp
 302         pushl   %ebx
 303         pushl   %esi
 304         pushl   %edi
 305
 306 EOF
 307         push(@out,$tmp);
 308         $stack=20;
 309         }
 310
 311 sub main'function_begin_B
 312         {
 313         local($func,$extra)=@_;
 314
 315         &main'external_label($func);
 316         $func=$under.$func;
 317
 318         local($tmp)=<<"EOF";
 319 .text
 320         .align $align
 321 .globl $func
 322 EOF
 323         push(@out,$tmp);
 324         if ($main'cpp)
 325                 { push(@out,"\tTYPE($func,\@function)\n"); }
 326         elsif ($main'gaswin)
 327                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 328         else    { push(@out,"\t.type    $func,\@function\n"); }
 329         push(@out,"$func:\n");
 330         $stack=4;
 331         }
 332
 333 sub main'function_end
 334         {
 335         local($func)=@_;
 336
 337         $func=$under.$func;
 338
 339         local($tmp)=<<"EOF";
 340         popl    %edi
 341         popl    %esi
 342         popl    %ebx
 343         popl    %ebp
 344         ret
 345 $const
 346 .${func}_end:
 347 EOF
 348         push(@out,$tmp);
 349         $const="";
 350
 351         if ($main'cpp)
 352                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 353         elsif ($main'gaswin)
 354                 { $tmp=push(@out,"\t.align 4\n"); }
 355         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 356         push(@out,".ident       \"$func\"\n");
 357         $stack=0;
 358         %label=();
 359         }
 360
 361 sub main'function_end_A
 362         {
 363         local($func)=@_;
 364
 365         local($tmp)=<<"EOF";
 366         popl    %edi
 367         popl    %esi
 368         popl    %ebx
 369         popl    %ebp
 370         ret
 371 EOF
 372         push(@out,$tmp);
 373         }
 374
 375 sub main'function_end_B
 376         {
 377         local($func)=@_;
 378
 379         $func=$under.$func;
 380
 381         push(@out,".L_${func}_end:\n");
 382         if ($main'cpp)
 383                 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
 384         elsif ($main'gaswin)
 385                 { push(@out,"\t.align 4\n"); }
 386         else    { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
 387         push(@out,".ident       \"desasm.pl\"\n");
 388         $stack=0;
 389         %label=();
 390         }
 391
 392 sub main'wparam
 393         {
 394         local($num)=@_;
 395
 396         return(&main'DWP($stack+$num*4,"esp","",0));
 397         }
 398
 399 sub main'stack_push
 400         {
 401         local($num)=@_;
 402         $stack+=$num*4;
 403         &main'sub("esp",$num*4);
 404         }
 405
 406 sub main'stack_pop
 407         {
 408         local($num)=@_;
 409         $stack-=$num*4;
 410         &main'add("esp",$num*4);
 411         }
 412
 413 sub main'swtmp
 414         {
 415         return(&main'DWP($_[0]*4,"esp","",0));
 416         }
 417
 418 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 419 #sub main'wtmp
 420 #       {
 421 #       local($num)=@_;
 422 #
 423 #       return(&main'DWP(-($num+1)*4,"esp","",0));
 424 #       }
 425
 426 sub main'comment
 427         {
 428         foreach (@_)
 429                 {
 430                 if (/^\s*$/)
 431                         { push(@out,"\n"); }
 432                 else
 433                         { push(@out,"\t$com_start $_ $com_end\n"); }
 434                 }
 435         }
 436
 437 sub main'label
 438         {
 439         if (!defined($label{$_[0]}))
 440                 {
 441                 $label{$_[0]}=".${label}${_[0]}";
 442                 $label++;
 443                 }
 444         return($label{$_[0]});
 445         }
 446
 447 sub main'set_label
 448         {
 449         if (!defined($label{$_[0]}))
 450                 {
 451                 $label{$_[0]}=".${label}${_[0]}";
 452                 $label++;
 453                 }
 454         push(@out,".align $align\n") if ($_[1] != 0);
 455         push(@out,"$label{$_[0]}:\n");
 456         }
 457
 458 sub main'file_end
 459         {
 460         }
 461
 462 sub main'data_word
 463         {
 464         push(@out,"\t.long $_[0]\n");
 465         }
 466
 467 sub main'puts
 468         {
 469             $constl++;
 470             &main'push('$Lstring' . $constl);
 471             &main'call('puts');
 472             &main'add("esp",4);
 473
 474             $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
 475         }
 476
 477 sub main'putx
 478         {
 479             $constl++;
 480             &main'push($_[0]);
 481             &main'push('$Lstring' . $constl);
 482             &main'call('printf');
 483             &main'add("esp",8);
 484
 485             $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
 486         }